G'day, thanks for your interest in how we calculate an experience's ranking score. It's at the core of Rankers so I'm pleased you're curious.
The ranking score percentage is used to compare and sort experiences in ranking tables. It is not necessarily a direct measurement of the quality of a particular experience as rated by its customers. I've found it a useful tool to allow me to find the best experiences with confidence. But I've also found it important to read the customer reviews before making any final judgements!
We calculate an experience's ranking score using a multi-factor data model instead of a raw data average (mean). This model takes into account several important questions. For instance - is there a trusted body of reviews? What is the age of a review and is the review from a credible source?
Below you'll find details around some of the important factors that went into calculating the ranking score for Waitomo Glowworm Caves.
If you have any questions or comments about our ranking score calculation please get in touch at info@rankers.co.nz. We don't believe this is perfect or complete so we're always interested in ways we might make improvements.
Waitomo Glowworm Caves
Valid Reviews
290 Valid Reviews
The Waitomo Glowworm Caves experience has a total of 291 reviews. There are 290 valid reviews that are included when calculating the ranking score and 1 invalid review that are excluded from the calculation. Reviews can be excluded only when a reviewer is not verified or after an investigation by our team determines the reviewer is not genuine.
Below is the distribution of ratings for the 290 valid reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 36 |
|
12% |
| 9/10 | 52 |
|
18% |
| 8/10 | 81 |
|
28% |
| 7/10 | 66 |
|
23% |
| 6/10 | 22 |
|
8% |
| 5/10 | 13 |
|
4% |
| 4/10 | 8 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
1% |
| 1/10 | 3 |
|
1% |
75.62% Average
The raw data average (mean) for all the Waitomo Glowworm Caves valid reviews is 75.62% and is based on 290 valid reviews. This value is not used to calculate the ranking score and it only provided here as a comparison to the weighted average.
Face-to-Face Reviews
263 Face-to-Face Reviews
The Rankers team meets with travellers while they’re in New Zealand and conducts face-to-face surveys. These reviews, in our opinion, are the most trusted in the industry and represent a critical control sample. To our knowledge, we are the only travel review website in the world that has gone to this extent.
More about face-to-face reviews
Within the 290 valid reviews, the experience has 263 face-to-face reviews collected during interviews by our team.
Below is the distribution of ratings for the 263 face-to-face reviews:
| Rating | Count | Percentage | |
|---|---|---|---|
| 10/10 | 29 |
|
11% |
| 9/10 | 49 |
|
19% |
| 8/10 | 76 |
|
29% |
| 7/10 | 57 |
|
22% |
| 6/10 | 21 |
|
8% |
| 5/10 | 13 |
|
5% |
| 4/10 | 7 |
|
3% |
| 3/10 | 5 |
|
2% |
| 2/10 | 4 |
|
2% |
| 1/10 | 2 |
|
1% |
75.36% Average
The raw data average (mean) for all the Waitomo Glowworm Caves face-to-face reviews is 75.36% and is based on 263 face-to-face reviews. This value is not used to calculate the ranking score and it only provided here for comparison purposes.
Weighted Average
75.74%
Rankers calculates a weighted mean as a base average on which we can improve. Individual review's ratings are given a weight based on several factors. The weight of a review determines the overall impact it'll have on the final weighted average.
Recent reviews have more weight as they are more relevant and reflect the experience as it currently operates. Over time reviews become less relevant and loose their impact on the ranking score.
Low rating reviews carry slightly less weight. This dampens the effect of very low ratings for every experience across the board. This is especially important when the experience has few reviews overall and a single negative rating can grossly mischaracterise an experience. Consistent poor reviews will still result in the experience receiving a comparitively low ranking score.
Credible sources provide reviews that can be trusted. If we have verified a reviewer is genuine via a face-to-face meeting then the review carries additional weight.
| Reviewer | Rating | Age | Relative Weight |
|---|---|---|---|
| Somysolanki | 7/10 | 607 days | 100% |
| Anne | 7/10 | 942 days | 62% |
| ros fraser | 4/10 | 2952 days | 2% |
| wynden | 1/10 | 2980 days | 1% |
| Rado Hank | 10/10 | 3067 days | 3% |
| Lizzie Edmonds | 8/10 | 3068 days | 3% |
| Anis Quentin | 7/10 | 3075 days | 3% |
| Jeny Smolders | 7/10 | 3079 days | 3% |
| Oscar Petersen | 8/10 | 3086 days | 3% |
| Ani | 9/10 | 3195 days | 3% |
| Martin Murlik | 8/10 | 3307 days | 2% |
| Laura | 9/10 | 3318 days | 2% |
| Melanie Farrell | 7/10 | 3326 days | 2% |
| Andy | 10/10 | 3333 days | 2% |
| Julia Achatz | 5/10 | 3347 days | 2% |
| Auba Mateos | 7/10 | 3353 days | 2% |
| Charlotte | 7/10 | 3353 days | 2% |
| Isabel Zedelius | 8/10 | 3356 days | 2% |
| Dries | 8/10 | 3396 days | 2% |
| Clarissa Glaser | 8/10 | 3397 days | 2% |
| Alna | 10/10 | 3402 days | 2% |
| Holger Worner | 9/10 | 3402 days | 2% |
| Karlee Hormell | 9/10 | 3411 days | 2% |
| Alonso | 9/10 | 3415 days | 2% |
| Rose Guillaume | 8/10 | 3418 days | 2% |
| Caroline Coudray | 8/10 | 3422 days | 2% |
| Barbara | 8/10 | 3422 days | 2% |
| Leonie Brabers | 7/10 | 3430 days | 2% |
| Bina Johansson | 10/10 | 3430 days | 2% |
| Sam Staines | 9/10 | 3434 days | 2% |
| Erik | 6/10 | 3437 days | 2% |
| Nicole Signer | 8/10 | 3444 days | 2% |
| Sam Taylor | 7/10 | 3448 days | 2% |
| Vanuxem | 8/10 | 3652 days | 1% |
| Clara Bertomeu | 10/10 | 3652 days | 1% |
| Lukas Boller | 9/10 | 3654 days | 1% |
| Mette Elholm | 7/10 | 3668 days | 1% |
| Mathilde Arp | 8/10 | 3668 days | 1% |
| Chloe and Guillame | 9/10 | 3672 days | 1% |
| Andre | 9/10 | 3674 days | 1% |
| Doerte | 10/10 | 3674 days | 1% |
| Saskia Peek | 9/10 | 3675 days | 1% |
| Erika Tarant | 8/10 | 3675 days | 1% |
| Jennifer Nguyen | 7/10 | 3676 days | 1% |
| Julie Duvert | 7/10 | 3676 days | 1% |
| Dan Ramsl | 4/10 | 3676 days | 1% |
| Lucy Mulvin | 7/10 | 3677 days | 1% |
| Fine Kochling | 9/10 | 3679 days | 1% |
| Eberhard | 9/10 | 3679 days | 1% |
| Hannes | 8/10 | 3680 days | 1% |
| Calum Penn | 9/10 | 3682 days | 1% |
| Arthur Portolleau | 6/10 | 3683 days | 1% |
| Elisabet | 10/10 | 3684 days | 1% |
| Tommy Mannien | 8/10 | 3685 days | 1% |
| Solange Bourbeois | 8/10 | 3688 days | 1% |
| Talissa Missiato | 10/10 | 3688 days | 1% |
| Severin Knegsch | 9/10 | 3689 days | 1% |
| Pierre Jouffineau | 10/10 | 3690 days | 1% |
| Lewis Whittle | 8/10 | 3692 days | 1% |
| Ben and Pauline | 8/10 | 3694 days | 1% |
| Ann-Kathrin | 7/10 | 3699 days | 1% |
| Natasha Harbinson | 10/10 | 3700 days | 1% |
| Sebastian | 2/10 | 3701 days | 0% |
| Jaquein Bucholz | 3/10 | 3701 days | 0% |
| Chiara | 7/10 | 3701 days | 1% |
| Cariotta Kemper | 3/10 | 3701 days | 0% |
| Megan Lenox | 7/10 | 3704 days | 1% |
| Max Mustermann | 8/10 | 3706 days | 1% |
| Amy Stafford | 8/10 | 3709 days | 1% |
| Carl | 7/10 | 3709 days | 1% |
| Briony | 7/10 | 3711 days | 1% |
| Melanie Kronbichler | 8/10 | 3712 days | 1% |
| Andreas Schiefer | 7/10 | 3713 days | 1% |
| Veronique Kaplan | 3/10 | 3715 days | 0% |
| Robin Ings | 6/10 | 3716 days | 1% |
| Stula Vladimir | 7/10 | 3717 days | 1% |
| David Soukal | 8/10 | 3717 days | 1% |
| Olivia Aliprandi | 7/10 | 3718 days | 1% |
| Isabelle | 2/10 | 3720 days | 0% |
| Jonathan Gourmel | 8/10 | 3720 days | 1% |
| Mikkel Palleson | 4/10 | 3723 days | 1% |
| Franziska and Sabine | 7/10 | 3724 days | 1% |
| Chloe Guerillot | 7/10 | 3724 days | 1% |
| Faye Oliver | 7/10 | 3726 days | 1% |
| Iris Kerbler | 9/10 | 3726 days | 1% |
| Til Schaebitz | 6/10 | 3727 days | 1% |
| Elisabeth Grabner | 9/10 | 3729 days | 1% |
| Berith | 10/10 | 3729 days | 1% |
| Chris Simpson | 6/10 | 3732 days | 1% |
| Pekka and Jonna | 9/10 | 3732 days | 1% |
| Jonas Hoerning | 8/10 | 3733 days | 1% |
| Nils | 10/10 | 3733 days | 1% |
| Mark Rosema | 8/10 | 3734 days | 1% |
| Lisa Huber | 10/10 | 3734 days | 1% |
| Nicola Wiggan | 9/10 | 3755 days | 1% |
| Linda and Gunther | 4/10 | 3756 days | 1% |
| Julie | 9/10 | 3757 days | 1% |
| Maria Schaer | 7/10 | 3761 days | 1% |
| Mette and Jesper | 5/10 | 3763 days | 1% |
| Pierre and Alexandra | 6/10 | 3769 days | 1% |
| Julia Waenninger | 8/10 | 3781 days | 1% |
| Sarah Boettcher | 9/10 | 3817 days | 1% |
| Suzanne Vermeulen | 6/10 | 3834 days | 1% |
| Blandine Giusti | 7/10 | 4037 days | 0% |
| Bart Hanssen | 6/10 | 4116 days | 0% |
| Astrid Egesten | 7/10 | 4168 days | 0% |
| Jean Curry | 9/10 | 4391 days | 1% |
| Carla Oyarzun | 1/10 | 4395 days | 0% |
| Philippe Chiasson | 9/10 | 4401 days | 1% |
| Helma Druyken | 4/10 | 4411 days | 0% |
| Florian Guttler | 7/10 | 4414 days | 1% |
| Casandra Prunica | 8/10 | 4415 days | 1% |
| Lauren Hedley | 7/10 | 4415 days | 1% |
| Janina Zwerver | 8/10 | 4415 days | 1% |
| Marieke Feyteres | 4/10 | 4419 days | 0% |
| van Linda Werner | 5/10 | 4419 days | 1% |
| Philip Donachie | 7/10 | 4429 days | 1% |
| Luisa Bach | 8/10 | 4429 days | 1% |
| Kristina | 7/10 | 4431 days | 1% |
| Eugen Lehner | 6/10 | 4432 days | 1% |
| Manuel Bach | 7/10 | 4432 days | 1% |
| Matthias Freiling | 2/10 | 4439 days | 0% |
| Debora Grusler | 6/10 | 4442 days | 1% |
| Andreas Brodhaeker | 8/10 | 4455 days | 1% |
| Renee van der Syde | 7/10 | 4456 days | 1% |
| Martha Horst | 8/10 | 4456 days | 1% |
| Roland Beer | 7/10 | 4460 days | 1% |
| Johanna Bak | 4/10 | 4460 days | 0% |
| Lior Bakski | 9/10 | 4470 days | 1% |
| Bet | 9/10 | 4471 days | 1% |
| Memain | 8/10 | 4744 days | 1% |
| Konza | 7/10 | 4745 days | 1% |
| Steen Rausmussen | 8/10 | 4776 days | 1% |
| David Restell | 10/10 | 4806 days | 1% |
| Christina Rodewald | 9/10 | 4811 days | 1% |
| Hanneke P | 7/10 | 4837 days | 1% |
| Kohler | 9/10 | 4857 days | 1% |
| Alexandra van den Brack | 6/10 | 4865 days | 1% |
| Paul Lawrence | 9/10 | 4866 days | 1% |
| Abby Rushmer | 7/10 | 4867 days | 1% |
| Stephan Olivier | 7/10 | 4872 days | 1% |
| Stephan Olivier | 7/10 | 4872 days | 1% |
| Faassen | 8/10 | 4876 days | 1% |
| Julie Lamart | 8/10 | 4877 days | 1% |
| Adrian Weidell | 5/10 | 5073 days | 1% |
| Jonathan Tuthill | 9/10 | 5128 days | 1% |
| A Ormsby | 10/10 | 5140 days | 1% |
| Gillian Rowe | 10/10 | 5153 days | 1% |
| Ryan Pynappels | 8/10 | 5154 days | 1% |
| Peter Dellen | 8/10 | 5155 days | 1% |
| Jorg Steffens | 8/10 | 5155 days | 1% |
| Danielle & Jobbe | 9/10 | 5157 days | 1% |
| Christina | 6/10 | 5158 days | 1% |
| Jop Veldhuis | 7/10 | 5158 days | 1% |
| Paul Weidenfeld | 8/10 | 5159 days | 1% |
| Sophie Dorrepaal | 7/10 | 5159 days | 1% |
| Fannette Peyreplane | 5/10 | 5160 days | 1% |
| Norm Cooper | 7/10 | 5164 days | 1% |
| Gloria, Rose & An | 8/10 | 5164 days | 1% |
| A Sorg | 10/10 | 5164 days | 1% |
| Samplonius | 5/10 | 5167 days | 1% |
| Petra | 10/10 | 5167 days | 1% |
| Bethany Hamilton | 8/10 | 5171 days | 1% |
| suffolkhouse69 | 9/10 | 5172 days | 1% |
| a a | 8/10 | 5203 days | 1% |
| Julia Balionis | 7/10 | 5217 days | 1% |
| Julia Hartman | 3/10 | 5218 days | 0% |
| Fabienne Indergand | 7/10 | 5238 days | 1% |
| Waldemar Schuler | 9/10 | 5250 days | 1% |
| pepette31 | 7/10 | 5325 days | 1% |
| Craig Hathaway | 9/10 | 5477 days | 1% |
| Stephane Lebel | 9/10 | 5482 days | 1% |
| Rens Hemselmans | 7/10 | 5495 days | 1% |
| Isabell | 10/10 | 5497 days | 1% |
| Holly Cave | 5/10 | 5497 days | 1% |
| J Palmer | 6/10 | 5501 days | 1% |
| Liz & Jim | 10/10 | 5503 days | 1% |
| Edgar & Marilyn Berry | 9/10 | 5505 days | 1% |
| Simon Vickers | 2/10 | 5508 days | 0% |
| Leslie | 8/10 | 5521 days | 1% |
| Jean-Francois Guilbault | 8/10 | 5522 days | 1% |
| Selina Mueller | 7/10 | 5523 days | 1% |
| Tamlin Barton | 3/10 | 5524 days | 0% |
| Cara Dungay | 8/10 | 5525 days | 1% |
| Bottcher | 10/10 | 5525 days | 1% |
| Alexandra | 10/10 | 5526 days | 1% |
| Philipp Rau | 7/10 | 5528 days | 1% |
| Dan Aldridge | 9/10 | 5530 days | 1% |
| John Allen | 8/10 | 5532 days | 1% |
| Curtis Penner | 8/10 | 5532 days | 1% |
| Brandt | 8/10 | 5534 days | 1% |
| Nadia Husain | 5/10 | 5537 days | 1% |
| T J Andrews | 6/10 | 5553 days | 1% |
| Charli Skinner | 7/10 | 5804 days | 1% |
| Carl_Larsen | 10/10 | 5813 days | 1% |
| Susan & Richard | 10/10 | 5874 days | 1% |
| Rik | 9/10 | 5875 days | 1% |
| Jonathan Martin | 7/10 | 5877 days | 1% |
| Gunda G | 9/10 | 5882 days | 1% |
| Aaron | 8/10 | 5884 days | 1% |
| Will Jemma | 6/10 | 5887 days | 1% |
| Christen Hans | 10/10 | 5888 days | 1% |
| Monica and Danie. | 7/10 | 5896 days | 1% |
| Stephen | 5/10 | 5898 days | 1% |
| Susan | 10/10 | 5898 days | 1% |
| snodge | 8/10 | 5902 days | 1% |
| Bo Moenstead | 9/10 | 5911 days | 1% |
| Alain Deslandres | 8/10 | 5915 days | 1% |
| Jakob Jurgen | 10/10 | 5916 days | 1% |
| EA Anders | 8/10 | 5919 days | 1% |
| Helen and Hans Walser | 1/10 | 5922 days | 0% |
| kevinp | 8/10 | 5945 days | 1% |
| warrenp | 9/10 | 5949 days | 1% |
| braunweiler | 9/10 | 5953 days | 1% |
| pimn | 9/10 | 5958 days | 1% |
| asiacritics | 7/10 | 5964 days | 1% |
| Chris Mackamul | 8/10 | 5971 days | 1% |
| Debbie Rathbone | 10/10 | 5971 days | 1% |
| Lisette X | 9/10 | 5972 days | 1% |
| Martin | 10/10 | 5974 days | 1% |
| Thomas Willi | 10/10 | 5974 days | 1% |
| Elodie | 7/10 | 5975 days | 1% |
| richardh | 7/10 | 6089 days | 1% |
| trvlbug | 8/10 | 6117 days | 1% |
| glennandjen | 10/10 | 6178 days | 1% |
| BryonyS | 9/10 | 6196 days | 1% |
| Marion | 9/10 | 6212 days | 1% |
| Mikey | 7/10 | 6213 days | 1% |
| Richard Komzik | 6/10 | 6214 days | 1% |
| Michael Walsall | 10/10 | 6218 days | 1% |
| Anna | 8/10 | 6232 days | 1% |
| Abigail | 7/10 | 6232 days | 1% |
| lannie | 7/10 | 6242 days | 1% |
| SimonR | 8/10 | 6242 days | 1% |
| SonjaG | 7/10 | 6242 days | 1% |
| Chris | 8/10 | 6248 days | 1% |
| AurelieD | 8/10 | 6255 days | 1% |
| Yunker | 10/10 | 6256 days | 1% |
| Andrew | 8/10 | 6258 days | 1% |
| Erin | 9/10 | 6258 days | 1% |
| Christopher Gallaga | 8/10 | 6264 days | 1% |
| Amy | 10/10 | 6270 days | 1% |
| Shona | 8/10 | 6270 days | 1% |
| plumbaum | 9/10 | 6272 days | 1% |
| Sandra | 10/10 | 6280 days | 1% |
| Evangelista | 8/10 | 6280 days | 1% |
| Oliver | 5/10 | 6282 days | 1% |
| Kat | 9/10 | 6312 days | 1% |
| Lisa | 8/10 | 6339 days | 1% |
| siobhan | 8/10 | 6341 days | 1% |
| Alice | 8/10 | 6341 days | 1% |
| NORTZ | 7/10 | 6370 days | 1% |
| Stefan | 8/10 | 6372 days | 1% |
| Hugh Trenchard | 9/10 | 6388 days | 1% |
| Niamh | 4/10 | 6395 days | 0% |
| Jenny | 9/10 | 6418 days | 1% |
| Louise | 8/10 | 6427 days | 1% |
| Peddy | 10/10 | 6437 days | 1% |
| Katie Wise | 8/10 | 6440 days | 1% |
| Thomas Bachmann | 8/10 | 6456 days | 1% |
| Daniala | 8/10 | 6475 days | 1% |
| Tom Ben | 9/10 | 6579 days | 1% |
| Sarah Maudsley | 8/10 | 6594 days | 1% |
| Alan Bellerby | 8/10 | 6594 days | 1% |
| Tina Daly | 5/10 | 6600 days | 1% |
| John Woodrow | 8/10 | 6609 days | 1% |
| Ernst Seter | 9/10 | 6609 days | 1% |
| Jim Curley | 7/10 | 6620 days | 1% |
| Daniel | 7/10 | 6621 days | 1% |
| Marc Hertogs | 7/10 | 6624 days | 1% |
| Laura Sutton | 5/10 | 6648 days | 1% |
| Jeroen | 5/10 | 6650 days | 1% |
| Mum! | 6/10 | 6650 days | 1% |
| Gail | 9/10 | 6654 days | 1% |
| Heike Julia | 6/10 | 6655 days | 1% |
| Lanni | 8/10 | 6655 days | 1% |
| Amanda Finger | 7/10 | 6656 days | 1% |
| Desiree Muri | 7/10 | 6656 days | 1% |
| Jan Grzejik | 8/10 | 6683 days | 1% |
| Wouter Ewalts | 8/10 | 6690 days | 1% |
| Matilde | 6/10 | 6698 days | 1% |
| Kim | 6/10 | 6895 days | 1% |
| Gillian | 8/10 | 6937 days | 1% |
| Denise Nick | 6/10 | 6947 days | 1% |
| ranker_110 | 8/10 | 6966 days | 1% |
| Jasper | 7/10 | 6973 days | 1% |
| Mary | 8/10 | 6973 days | 1% |
| Lucy | 6/10 | 6973 days | 1% |
| Lukas | 8/10 | 6984 days | 1% |
| Hanna | 7/10 | 6986 days | 1% |
Adjustments
Several adjustments to the weighted average are added to improve relevancy and credibility. These adjustments apply equally to all experiences that meet the criteria.
Sample Size Adjustment
No Adjustment
A reasonable number of reviews are necessary in order for the average to be credible and for an experience to take a prime position within the ranking tables. As such, experiences with only a few reviews have a moderated score. This does not mean that the experience or the reviews can't be trusted. The Waitomo Glowworm Caves experience has plenty of reviews and does not meet the criteria for any adjustment.
Recent Reviews Adjustment
-3.75% Adjustment
There may be an adjustment if this experience hasn't received any reviews within the last 60 days. However the Waitomo Glowworm Caves experience does not meet the criteria for any adjustment.
In addition, an experience's ranking score may be adjusted for each day there is no new ranking. After 1 day the adjustment comes into effect. The maximum number of days that can be adjusted for is 200 days. Due to the seasonal nature of many businesses, this adjustment is applied dynamically throughout the year.
The Waitomo Glowworm Caves experience has been adjusted for 200 days. Adjustments are according to the following table.
| Days | Adjustment |
|---|---|
| … | … |
| 197 | -3.70% |
| 198 | -3.72% |
| 199 | -3.74% |
| 200 | -3.75% |
| 201 | -3.77% |
| 202 | -3.79% |
| 203 | -3.81% |
| … | … |
Balancing Adjustment
5.96% Adjustment
Every experience's review score is adjusted to balance out the disproportional number of negative reviews that are contributed.
You won't be surprised to learn that disgruntled customers are more likely to leave a review than happy ones. They are motivated to share their experience and warn others. We consider this a good thing and it's why reading the reviews is important. However we've learned it can misrepresent the experience in a more overall sense.
We apply a balancing adjustment to counteract this effect and ensure the ranking score is a more fair representation of the experience. This adjustment is applied equally to all experiences.
Final Ranking Score
78%
The final ranking score once any adjustments, ratings, and rounding has been applied. This value is recalculated each day and a short rolling average is applied. Therefore it may not be precisely accurate based on the other values presented.